Not too long ago, Apple added the Video Decode Acceleration framework to Mac OS X, allowing developers to get low-level access to hardware H264 acceleration. Adobe was quite thrilled about this, because they claimed this was needed for Flash video to become hardware accelerated on the Mac. This feature's been in beta for a while now, but yesterday they finally released it as part of a regular Flash Player update. Caveat: Apple's support for this framework can be a bit sketchy.